Alexander Calder - WikipediaAlexander Calder ( ˈ k ɔː l d ər ; July 22, 1898 – November 11, 1976) was an American sculptor who is best known for his innovative mobiles (kinetic sculptures powered by motors or air currents) that embrace chance in their aesthetic and his monumental public sculptures Born into a family of artists, Calder's work first gained attention in Paris in the 1920s and was soon championed by